Electric regulator.



UNITED sTATEs PATENT oEEIcE.

JOHN L. CREVELING, OF NEW YORK, N.Y.,`ASSIGNOR TO SAFETY CAR HEATING AND LIGHTING COMPANY,` A CORPORATION OF NEW JERSEY.

' ELECTRIC REGULATOR;

specification o'f Ltters'ratent.

Patented Oct. 10, 1916.

Applcatonled December 11, 1909. Serial No. 532,615.

T 0 all whom t may concern:

Be it known that' I, JOHN L. CREVELING, a

Aresident otl New York, in the county and Stateof New York, have invented certain thereof. A

My invention pertains to that class of electric regulators adapted to control or regulate an electric circuit in a desired manner.

My invention has for its particular object to produce a' simple and effective type of regulator whichjmay be used to govern an electri'c vcircuit by varying the conditions therein in such manner as to produce a 'regu lating effect.

In the drawing Figure I is a front ele vation of one type of regulator comprehending my invention. Fig. II is a section of the regulator' shown in Fig. I. y

In the drawing l represents. any suitable base of insulating material upon which my Yimproved regulator is mounted.

2 represents the core of a suitable mag gnet, in this instance shown of t-he iron clad type proyided with a magnetic jacket 3 and held firmly in place upon the base 1 as by the screw-el. The Acore 2 is surrounded by the winding A5 which may be wound upon a spool G as indicated." One end of the wind- 'ing may be led as by the wire 7 to any suitable type of potential varying device as, for example, 'thevariable resistance indi cated at 8 which may be connected as lby.

Wire9 with any suitable source of electromotive force as indicated by the battery 10, the other side of which is shown as connected to the other end of the winding 5 as by the Wire 1l.

12 represents an armature of magnetic material in operative relation to the magnetic field set up by the winding 5. The

springs 13 normally tend to push the arma' ture 12 away from the magnet core2and the limit of travel which the springs are able to` givethe armature 12 is adjusted as by the nuts 14 upon the stud lwhich is of noni magnetic material and passes through a slip hole in .the armature 12.

16 indicates steady pins of non-magnetic material which are fastened into the4 jacket 3 and free to slide in the holesA 17 inthe armature 12 in such manner as -to prevent the armature from rotating.l The armature 12 carries threev arms indicated at 18 which `are/provided near their extremities with screws 19 which may be locked in place as 'by jam nuts 20. Uponl the 'base lthere are .mounted three metallic or other conducting plates 21 with which electrical'connection may be established asby means of studs 22. Upon these plates are set piles of contacting electrodes'23, the pressure upon which may vary their resistanceas, for example, carbon plates or disks. These are held in'place as by glass or other insulating tubes 24 secured to the base l as by means ot' screws 25. 26 indicates metallic or other' conducting plates resting upon the contacting electrodes 23 and vforming electrical comiecn tion therewith. Line connection with the said plates 2G may be established as by means of binding posts 27.. The plates 26 are pro- .yided with insulating members 28 which form a mechanical connection between the screws 19 and the plates'26 and electrically insulate them therefrom;

29 represents any lsuitable source of electric current, in this instance indicated as a battery, the circuit of which it is desired to regulate by my improvedregulator. 30 indicates the positive lead from the said source of electro-motive force 29jto one side of the lamps or other translating devices indicated at 31,-the other side 'of which is connected as by wire 32 with the binding posts 27. From the binding post o r stud the wire 33 is carried to the opposite side of the source of electric -current 29.

The operation of my 'improved electric regulator is substantially as follows: In practice, under certain conditions, I find it ,advisable to use three piles or units 'ot' resistance varying members, the resistance of which is varied by pressure for the reason l'that the pressure may be applied at asingle point and with little dilticulty equally disvHowever,- as this connection will be obvious to one skilled in the art, for the sake of sim- -plicity'I haveshown in the drawing only one of the resistance varying members electrically connected with' a circuit itis de`- sired to govern. The other members may be 

